Electric vulcanizer.



E. l. WIGGENSL. ummm VULCANIZER. APPLICATIQN ma JuLYgLmW HENEWED Jimi 16, 1915.

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UNITED sTATns PATE f onirica.; l

EDWARD J'. 'WIGGINS, OF CHICAGG, ILLINOIS, ASSIGNOR T0 DAVID ALBERT'HEYMAN,

, F CHICAGO, LLINOIS.

Specification of Letters Patent.

Patented Jan. 25, 1916.

application niet Juiy a7, i914, semi No. 853,327. Renewed Julie is, 1915. serial No. 34,551.

To all whom t may concern.'

Be it known that I, EDWARD J. VViGGiNs, a citizen ot' the United States, "residing at Chicago, in the county of Cook and State of illinois, have invented certain new and useful lniprovements in Electric Vulcanizeis,

` able,

of Which the following is a specification.

My invention' 'relates to electric vulcanizers and has for its general objectJ to provide-,a simple, cheap and eiiicient portable electric vulcanizer, suoli as may be carried in the tool kit of an automobile and used on the current supplied by the automobile batterv.

One of the objects of my invention is to provide a. construction which will eliiciently heat the vulcaiiizing' surface; reduce the exposed area thereof to a minimum so that the vulcanizer may be used out of doors, in the Wind, and under otherwise unfavorable conditions; make the same simple, cheap, durnot liable to get out of order, easy of repair; and capable of facile manipulation. A Figure 1 is a perspective vievv showing a vulcanizer embodying my invention; Fig. 2

is a longitudinal sect-ion through the major portion thereof; Fig. 3 is an enlarged view of the heat unit or cartridge detached; Fig.

4 is an enlarged view of the heat applicator, With a portion thereof in section; Fig. 5 1s a transverse section on line 5-5 ot' Fig. .2.'

The heat-applicator elementot the vul canizer, generally indicated at 10, provides a heating;I head 11, which is preferably made of copper, and preferably takes the form of a. rather thin disk', having relatively large planar area. and relatively small peripheral An electrical effective heating of the entire plane surface of the disk and preferably consists of an electric heating` coil disposed in an interspace between concentric .Walls that will, bv

convection, ltransmit their heat to the disk. Specifically, the disk 11 has a boss 12 and a central'stem 13, that may be integral, and

around the boss, spaced apart from the stem 13, is la heating shell 14, the interspace '15 4 being operi' for insertion of the heat-coil car-A tridge. Although a structure providing the separated concentric"heat-conducting walls may be constructed in various Ways, I prefer l that the entire structure be of copper, the

shell 14 being a tubing section orced on the boss 12, so that in ell'ect the structure is substantially unitary.

The heat-coil element in the preferred construction shown-is a seltsiipporting, detachable, cartridge 17, consisting ot a mica cylinder 18arranged to tit nicely on the stein 13 and exteriorly carrying upper and lower connector-rings 19 and 20, to which are secured the ends of the -resistanccwire 21 that is wound preferably in an open coil, on the mica cylinder. The electrical connections 212-22', are led ott' from opposite rings 20 and 19, respectively, and the heating` unit thus positioned in the space 15 between the two conducting' walls lil-d4, very effectively heats up the two Walls, and consequently the head or vulcaniziiig plate 11. ln practice, l prefer to make the heat unit one that Will effectively heat up the disk to .say 265 on a rneet one of the Wires, 22, With a screw 23 which is extended through the shell 14 and engages the ring 20, While the other wire 22', l pass through an insulating disk 24 of mica, that ovei'lies the shell 14 and closes the upper end of the heating space 15. An outer casing, properly heat-insulated from the shell 1li is provided, this casing, in the particular construction shown being'a tubinge section 2'? of metal, bearing on a. Dmica Washer 28 and preferably nearly coinciding in size withv the disk 11. Vertically the casing preferably extends materially above thevupper end of the stem 13, and the comparatively large interspace between the casing and the hell 14 is filled with asbestos Wool, or power, 29. A fiber cap 30 fitting on the upper end of the casing 37 is secured in position by a screw 31 extending into a suitable bore 32 in the stem 13, and the screw head 33 forms a central convex boss for purposes to be described. Thus the shell 27 is clamped in position and so insulated that relatively little heat is imparted thereto, so that the danger of burning the operator is practically obviated and heat Wastage is minimized. A handle 35 secured on a stem 36, that makes or other heat-insulating material, as at 43, of asbestos or other material of relatively low heat conductivity. On the ends of plate 41 are solidly mounted two posts 44, one

having pivoted thereto at its upper end, asl

at 45, a bridge bar 4G the free extremity'o'f which is provided with a hook 47 to engage 'a reduced neck 48 of the other post.` A pressure screw 49 extends through a suitable bearing in the bridge-bar in axial alinement with the base pad 43, and its lower end 1s concaved, as at 50, to coperate with the boss 33 presented by the headof the screw.

' or open the space therebetween, anda pressure screw carried by said bridge; and an` applicator providing a heating-head ex.

It will be apparent that lwhen the screw 49 is ru-n out, the bridge 46 may be swung on its pivoted end disengaging its hook 47 from the neck 48, and leaving an opening between the posts tree for insertion of an inner tube of a tire,` or other article to be vulcanized.v When the bridge is swung back to the position shown in Fig. 1, screw 49 may be run in, its conical end engaging the screw head 33 and centering the applicator 10 with respect to the pad 43, and exerting any desired amount of pressure thereon.

I iind in practice that a vulcanizer so constructed may very effectivelyjbe used for emergency repairs to automobile tires and the like, its construction causing the vulcanizing head or disk` 11 to receive a relatively high degree of heatand permittin5 but little heat dissipation even when use in wind or rain. It will be apparentthat the device may be readily taken a Dart for removal of the heating cartridge an the insertion ot an other, either to vary the resistance to suit the current supply available to a particular user or to permit the replacement in case a heating coil burns out.

While I have herein described insome detail a particular embodiment of my invention, it will be apparent to those skilled in the art that changes `in the detail of construction might be made without departure from `the spirit of my invention and within the scope ot' the appended clairhs.`

What I claim is:

1. A portable electric vulcanizer, consisting of ac frame comprising a base, vertical posts, a bridge movable to span said posts posed toward the base, an electrical heating unit associated with said head, and a shell heat-insulated from said heating unit, said/v shell providingnneans coperating with qthe screw to center the shell upon the base and transmit the screw pressure to the'heatinghead.

2. In a portable electric vulcanizing ap'- paratus, an applicator comprising a heating head, concentric spaced apart walls forming an annular chamber therebetween, said walls being formed of a material having high heat conducting qualities, and the ends thereof adjacent the heating head being intimately connected therewith, an electric heating coil positioned in the said annular chamber, and a casing surrounding and heat-insulated from said walls.

3. In a portable electric vulcanizing apparatus, an applicator comprising a heating head, concentric spaced-apart walls forining an annular chamber therebetween, said walls being 'formed of a material having high heat conducting qualities and the ends thereof adjacent the heating head being intimately associated therewith, a removable annular cartridge comprising an insu lating cylinder and an electric heating coil wound thereon, positioned. in said annular chamber and a casing surrounding and heatinsulated from said walls and having a handle.

4. A portable element, comprising, in cornbination, a vulcanizer head; separated concentric walls extending at right angles to said head; a removable annular cartridge in the space between said walls, comprising an insulating cylinder, a coil of resistance wire wound thereon, and conduct-ing rings mounted adj acct tlie ends of said insulating cylinder and to which the ends of the heat coil are connected; and a casing surrounding and heat-insulated from said walls and having a handle.

5. ln a portable electric vulcanizer, the combination of a frame comprising a base .and a bridge connected thereto; an electrically heated applicator providing v a heating head exposed toward the base, and ineans carried by said bridge and coperating with the applicator for pressing said heating head toward the base.` A

6. In a portable vulcanizer, the combinavtion of a frame comprising a base vand a bridge connected thereto; an ,electrically heated applicator providing a heating head exposed toward' the base, a centrally located projection on'the end of said applin cator opposite to the heating head end, and means carried by said bridge and coperating with said projection to center'the applicator vand press the saine toward the base.

7. A portab-le'element co prising, in combination, a vulcanizer hea separated concentric walls extending 'from said head, an insulating cylinder betweensaid walls, a coil of'resistance wire wound thereon, contact-ing rings mounted adjacent the ends ofsaid insulating cylinder and to which the` cap on one end of the casing, a heating disk at the other end of the easing having a stem extending into the inte-rior of tlie easing, a screw connecting said czip and stein, a shell in lient-conducting Contact with thev dislr interposed between the casing and the stem spaced apart from both thereof, a closure for the top of the space between 'the sliell and Steinl arranged beiow tbe level of the cap `forV the easing, a heating coil in the open space between said stein and sliell, sind :t body of -lientdnsulating material filling the space between the casing and cap and the shell and clornire.l '9. 'In a portable electric vulcanizer apparatus, the combination with u frame, comprising a base, separated posts extending disk, a stern extending therefrom, a casingV surrounding and spaced apart' from said stem, a' heating coil surrounding the stem, a cap for the casing and a screw securing n said cap to the stern and providing a central boss coacting with the depression of the pressure screw of the frame to center the applicator on the insulating pad and to communicate pressure from the screw to the beating disk.

ln testimony whereof I hereunto set my band in the presence of two subscribing Witnesses.

EDWARD J. ,WIGGINS In tbeA presence of FORE BAIN, Bilder Y. ALLEN. 

